1-苯基-3-甲基-5-氯-4-吡唑甲醛与4-氨基-5-取代苯基-1,2,4-三唑-3-硫酮缩合生成4-(1-苯基-3-甲基-5-氯吡唑次甲亚胺基)-5-(取代苯基)-2H-1,2,4-三唑-3(4H)-硫酮,再烷基加成化为新型含吡唑基5,6-2H-1,2,4-三唑[3,4-b][1,3,4]噻二嗪衍生物.化合物结构经1H NMR、IR以及元素分析确认.初步生物活性测试结果表明,在100 mg/L浓度下,化合物8a(3-(2-甲基苯基)-6-(5-氯-2-甲基4-苯基吡唑)-7-(4-硝基苯基)-5H-1,2,4-三唑[3,4-b][1,3,4]噻二嗪)对黄瓜炭疽病的抑制率达90％.
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